VPVijoy Paulinblog.vijoypaul.com·1d ago · 10 min readHow I Reduced API Response Time by 40% Using Redis Caching in Node.js A few months back, I started getting Slack messages that every backend engineer dreads: "hey, is the app slow for anyone else?" Nothing was down. No errors in the logs. Just... sluggish. Pages that us10
SPSaswata Paulinbrokenbydesign.hashnode.dev·1d ago · 4 min readSame Sockets, New Electrician: Handing Wiring to SpringIn my last post, I proved you don't need Spring to decouple your code. An interface, constructor injection, and a few lines of manual wiring in Main — that's all it took. I stand by every word of that00
MSManikandan Sinmanikandan4411.hashnode.dev·2d ago · 5 min readConditional Statements in JavaIntroduction In programming, we often need to make decisions based on certain conditions. For example: If a user enters the correct password, allow login. If a student's mark is above 40, show "Pass00
SESalah ElRazzazinsalahrzzaz.hashnode.dev·3d ago · 6 min readAddDbContext vs AddDbContextPool vs AddDbContextFactory in EF CoreChoosing the wrong DbContext registration can create problems that look like database bugs, concurrency issues, or dependency-injection errors. The three common EF Core registrations are: AddDbContex00
AKAshmit Kumar Patrainashmitcodes.hashnode.dev·4d ago · 44 min readHow LLMs Actually Work (and How to Build AI with Them)Everything you need to go from "what even is GenAI?" to shipping real AI-powered apps with JavaScript — no PhD required. Who Is This For? You're a developer. You build things. You've been hearing "A00
FAFortune Alebiosuinfortunethedev.hashnode.dev·4d ago · 11 min readBuilding a Multi-Container Setup for the 2026 FIFA World CupThe long awaited 2026 World Cup is finally here, and with FIFA increasing the team count to 48 teams from the long-standing 32 team count, there are now even more games to analyze and keep track of. H00
MSManikandan Sinmanikandan4411.hashnode.dev·6d ago · 6 min readOperators in JavaIntroduction Java is one of the most popular programming languages used for developing web applications, enterprise applications, mobile applications, and backend systems. In Java programming, operato00
BSBikki Singhincodepractice-blogs.hashnode.dev·6d ago · 9 min readTop 10 PHP Bugs Every Beginner Makes (And How to Fix Them)You write what looks like perfectly reasonable PHP. You hit refresh. Blank white screen — no error, no warning, no clue what went wrong. This is PHP's most frustrating feature for beginners: it fails 00
PMPeace Melodiinpeacemelodi.hashnode.dev·Jun 22 · 5 min readBuilding a Flash Sale Engine That Cannot Oversell: Distributed Locking and Optimistic Concurrency in NestJSThe problem flash sales create Flash sales create one of the most unforgiving concurrency problems in backend engineering. Thousands of people request the same limited stock in the same instant. If tw10
TDTapan Dabraiintapandabrai.hashnode.dev·Jun 22 · 8 min readWhat Real Backend Development Looks LikeThe Day Production Stops Caring About Your Confidence You finally feel confident with Spring Boot. You can spin up a REST API in twenty minutes, wire up Postgres, add some validation, ship it. Then pr20
